Racist jokes are often hillarious.

You don’t make racist jokes because they’re not funny. You don’t make racist jokes because they’re racist and dehumanizing.

A joke doesn’t don’t stop being funny because it’s racist, but it does become dehumanizing and reflects very poorly on whoever is telling the joke. It also signifies a lack of wit because racist jokes are often very, very easy most of the time.

It’s not that someone telling a racist joke isn’t funny. It’s that they’re also a piece of shit.